Modify the "dangerous download" algorithm as follows. Original patch by Pier...

chrome/common/render_messages_params.cc

Index: chrome/common/render_messages_params.cc
===================================================================
--- chrome/common/render_messages_params.cc	(revision 68377)
+++ chrome/common/render_messages_params.cc	(working copy)
@@ -66,6 +66,7 @@
       request_context(0),
       appcache_host_id(0),
       download_to_file(false),
+      has_user_gesture(false),
       host_renderer_id(0),
       host_render_view_id(0) {
 }
@@ -938,6 +939,7 @@
   WriteParam(m, p.appcache_host_id);
   WriteParam(m, p.upload_data);
   WriteParam(m, p.download_to_file);
+  WriteParam(m, p.has_user_gesture);
   WriteParam(m, p.host_renderer_id);
   WriteParam(m, p.host_render_view_id);
 }
@@ -960,6 +962,7 @@
       ReadParam(m, iter, &r->appcache_host_id) &&
       ReadParam(m, iter, &r->upload_data) &&
       ReadParam(m, iter, &r->download_to_file) &&
+      ReadParam(m, iter, &r->has_user_gesture) &&
       ReadParam(m, iter, &r->host_renderer_id) &&
       ReadParam(m, iter, &r->host_render_view_id);
 }
@@ -989,6 +992,8 @@
   l->append(", ");
   LogParam(p.download_to_file, l);
   l->append(", ");
+  LogParam(p.has_user_gesture, l);
+  l->append(", ");
   LogParam(p.host_renderer_id, l);
   l->append(", ");
   LogParam(p.host_render_view_id, l);